CN106023877B - Common electrical voltage regulator circuit, method, display panel and device - Google Patents

Common electrical voltage regulator circuit, method, display panel and device Download PDF

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Publication number
CN106023877B
CN106023877B CN201610670268.5A CN201610670268A CN106023877B CN 106023877 B CN106023877 B CN 106023877B CN 201610670268 A CN201610670268 A CN 201610670268A CN 106023877 B CN106023877 B CN 106023877B
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China
Prior art keywords
common voltage
feedback
negative
common
input terminal
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CN201610670268.5A
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CN106023877A (en
Inventor
陈帅
张智
肖利军
张元波
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BOE Technology Group Co Ltd
Chongqing BOE Optoelectronics Technology Co Ltd
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BOE Technology Group Co Ltd
Chongqing BOE Optoelectronics Technology Co Ltd
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Priority to CN201610670268.5A priority Critical patent/CN106023877B/en
Publication of CN106023877A publication Critical patent/CN106023877A/en
Priority to US15/674,387 priority patent/US10037737B2/en
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • G09G3/3655—Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3696—Generation of voltages supplied to electrode drivers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2230/00—Details of flat display driving waveforms
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/0291—Details of output amplifiers or buffers arranged for use in a driving circuit
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0204—Compensation of DC component across the pixels in flat panels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0247—Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/12—Test circuits or failure detection circuits included in a display system, as permanent part thereof
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3674—Details of drivers for scan electrodes
    • G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Logic Circuits (AREA)

Abstract

The present invention provides a kind of common electrical voltage regulator circuit, method, display panel and device.The common electrical voltage regulator circuit includes: filter unit；And, control unit, for controlling the connection disconnected between common voltage feedback line and the second input terminal of common voltage negative-feedback amplifying unit in compensated stage, and it controls benchmark common voltage output end and is connect by filter unit with second input terminal, the connection between conducting common voltage feedback line and second input terminal is controlled in non-compensated stage, and controls the connection disconnected between benchmark common voltage output end and second input terminal；At the time of the initial time of the compensated stage is that the clock signal of clock cable output of the distance between the common voltage feedback line in predetermined distance range is in rising edge and/or failing edge, and the compensated stage maintains preset duration.The present invention can solve clock cable in the prior art and lead to the problem of horizontal band to the coupling of common voltage cabling.

Description

Common electrical voltage regulator circuit, method, display panel and device
Technical field
The present invention relates to common voltage regulation technology field more particularly to a kind of common electrical voltage regulator circuits, method, display Panel and device.
Background technique
Currently in order to realizing that low cost and narrow frame, most of display panel all use GOA (Gate driver On Array, array substrate row actuation techniques.But use the common voltage cabling (common electrical on the display panel of the technology Pressing cabling includes common voltage feedback line and common voltage compensating line) and close, the common voltage of the distance between clock cable Common voltage meeting subject clock signal coupling on cabling is affected, and the clock signal of clock cable output is made It is very high (can achieve 30V) for the control input voltage amplitude of GOA unit, cause the Ripple (fluctuation) of common voltage very big, And then generate horizontal band.
Summary of the invention
The main purpose of the present invention is to provide a kind of common electrical voltage regulator circuit, method, display panel and devices, with solution Certainly clock cable leads to the problem of horizontal band to the coupling of common voltage cabling in the prior art.
In order to achieve the above object, the present invention provides a kind of common electrical voltage regulator circuit, including benchmark common voltage are defeated Outlet and common voltage negative-feedback amplifying unit；The first input end and the benchmark of the common voltage negative-feedback amplifying unit The connection of common voltage output end, the output end of the common voltage negative-feedback amplifying unit are connect with common voltage compensating line；Institute State common electrical voltage regulator circuit further include:
Filter unit, respectively with the of the benchmark common voltage output end and the common voltage negative-feedback amplifying unit The connection of one input terminal, the ripple of the benchmark common voltage for filtering out the benchmark common voltage output end output；And
Control unit is amplified with the filter unit, common voltage feedback line and the common voltage negative-feedback single respectively The second input terminal connection of member, for negative anti-in the compensated stage control disconnection common voltage feedback line and the common voltage The connection between the second input terminal of amplifying unit is presented, and controls benchmark common voltage output end and passes through the filter unit and institute The common voltage feedback is connected in the control of non-compensated stage in the second input terminal connection for stating common voltage negative-feedback amplifying unit Connection between line and the second input terminal of the common voltage negative-feedback amplifying unit, and control and disconnect the benchmark common electrical Press the connection between output end and the second input terminal of the common voltage negative-feedback amplifying unit；
The initial time of the compensated stage is the distance between described common voltage feedback line in predetermined distance range At the time of the clock signal of interior clock cable output is in rising edge and/or failing edge, the compensated stage remains default Duration；
The non-compensated stage is other stages removed except the compensated stage.
When implementation, the filter unit includes filter capacitor.
When implementation, the common voltage negative-feedback amplifying unit includes negative feedback operational amplifier, first resistor, the second electricity Resistance and 3rd resistor, wherein
The second resistance is connected to the inverting input terminal of the negative feedback operational amplifier and the negative-feedback operation is put Between the output end of big device；
The inverting input terminal of the negative feedback operational amplifier is connect with the first end of the first resistor；
The first end of the 3rd resistor is connect with the benchmark common voltage output end, the second end of the 3rd resistor It is connect with the normal phase input end of the negative feedback operational amplifier；
The second end of the first resistor is connect with described control unit；
The output end of the negative feedback operational amplifier is connect with common voltage compensating line.
When implementation, described control unit includes:
Pulse control signal generation module, for generating pulse control signal, the pulse width of the pulse control signal Corresponding to the compensated stage；And
Switch module is connect, for the control in the pulse control signal with the pulse control signal generation module Under, the second input of the common voltage feedback line and the common voltage negative-feedback amplifying unit is disconnected in compensated stage control Connection between end, and control benchmark common voltage output end and pass through filter unit and the common voltage negative-feedback amplifying unit The second input terminal connection；The common voltage feedback line is connected in the control of non-compensated stage to put with the common voltage negative-feedback Connection between second input terminal of big unit, and it is negative with the common voltage to control the disconnection benchmark common voltage output end Feed back the connection between the second input terminal of amplifying unit.
When implementation, the pulse control signal generation module includes pulse signal generator.
When implementation, the pulse control signal generation module is used to be in when the clock signal of clock cable output When rising edge and/or failing edge control pulse control signal current potential from the first level jump be second electrical level, and keep described in Jump is first level after second electrical level preset duration, keeps first level until what the clock cable exported Clock signal is again at rising edge and/or failing edge；
It is described public that the switch module is used for the control disconnection when the current potential of the pulse control signal is second electrical level Connection between Voltage Feedback line and the second input terminal of the common voltage negative-feedback amplifying unit, and control benchmark common electrical Pressure output end is connect by filter unit with the second input terminal of the common voltage negative-feedback amplifying unit；
The switch module is also used to when the current potential of the pulse control signal be that the public affairs are connected in the first level time control system Connection between common voltage feedback line and the second input terminal of the common voltage negative-feedback amplifying unit, and control described in disconnection Connection between benchmark common voltage output end and the second input terminal of the common voltage negative-feedback amplifying unit.
When implementation, when first level is high level, the second electrical level is low level；When first level is When low level, the second electrical level is high level.
When implementation, common electrical voltage regulator circuit of the present invention further includes first capacitor；
The switch module includes:
First switch transistor, the control terminal of the first switch transistor and the output of pulse control signal generation module End connection, first end are connect by the first capacitor with the common voltage feedback line, and second end passes through the first resistor It is connect with the inverting input terminal of the negative feedback operational amplifier；And
Second switch transistor, the control terminal of the second switch transistor and the output of pulse control signal generation module End connection, first end are connect by the filter unit with the normal phase input end of the negative feedback operational amplifier, and second end is logical The first resistor is crossed to connect with the inverting input terminal of the negative feedback operational amplifier.
When implementation, there are 2N clocks in predetermined distance range at a distance between the common voltage feedback line Signal wire, and the n-th clock signal of nth clock cable output and the N+n clock of the N+n articles clock cable output are believed When number with same frequency and reversed-phase, the common voltage feedback line and the common voltage compensating line are all set in the 2N clock letter Among number line；
The nth clock cable and the N+n articles clock cable are respectively arranged at the common voltage feedback The two sides of line, and the distance between the nth clock cable and the common voltage feedback line be equal to described the N+n articles when The distance between clock signal wire and the common voltage feedback line；
N is positive integer, and n is the positive integer less than or equal to N.
The present invention also provides a kind of common voltage adjusting methods, described applied to above-mentioned common electrical voltage regulator circuit Common voltage adjusting method includes:
The benchmark that the first input end of common voltage negative-feedback amplifying unit receives the output of benchmark common voltage output end is public Common voltage；
Under the control of the control unit, in compensated stage, the second input terminal of the common voltage negative-feedback amplifying unit The benchmark common voltage for receiving the output of benchmark common voltage output end passes through the ripple after filter unit；In non-compensated stage, institute The second input terminal for stating common voltage negative-feedback amplifying unit receives the signal of common voltage feedback line output；
The output end of the common voltage negative feedback amplifier circuit is to common voltage compensating line output signal.
The present invention also provides a kind of display panel, including common voltage feedback line, common voltage compensating line and above-mentioned Common electrical voltage regulator circuit.
When implementation, display panel of the present invention further includes 2N clock cable；
The distance between the 2N clock cable and the common voltage feedback line are in predetermined distance range, and N-th clock signal of n articles of clock cable output and the N+n clock signal with same frequency and reversed-phase of the N+n articles clock cable output, The common voltage feedback line and the common voltage compensating line are all set among the 2N clock cable；
The nth clock cable and the N+n articles clock cable are respectively arranged at the common voltage feedback The two sides of line, and the distance between the nth clock cable and the common voltage feedback line be equal to described the N+n articles when The distance between clock signal wire and the common voltage feedback line；
N is positive integer, and n is the positive integer less than or equal to N.
The present invention also provides a kind of display devices, including above-mentioned display panel.
Compared with prior art, common electrical voltage regulator circuit, method, display panel and device of the present invention, with The clock signal of clock cable output of the distance between the described common voltage feedback line in predetermined distance range is in upper It is not that common voltage negative-feedback is not put by public electrode voltages feedback line by control unit control when rising edge and/or failing edge Big unit provides input signal, and controls and provided by benchmark public electrode voltages output end for common voltage negative-feedback amplifying unit Input signal improves common voltage wave phenomenon with control, eliminates the clock cable and makees to the coupling of common voltage cabling With to improve horizontal band.
Detailed description of the invention
Fig. 1 is a kind of circuit diagram of common electrical voltage regulator circuit；
Fig. 2 is the structural block diagram of common electrical voltage regulator circuit provided in an embodiment of the present invention；
Fig. 3 be another embodiment of the present invention provides common electrical voltage regulator circuit structural block diagram；
Fig. 4 is the circuit diagram of a specific embodiment of common electrical voltage regulator circuit provided by the invention；
Fig. 5 A be common voltage cabling in the specific embodiment of common electrical voltage regulator circuit provided by the invention and when Positional diagram between clock signal wire；
Fig. 5 B is each clock cable output in the specific embodiment of common electrical voltage regulator circuit provided by the invention Clock signal and common voltage feedback line VCOM-Feedback output voltage waveform diagram；
Fig. 5 C is the working timing figure of the specific embodiment of common electrical voltage regulator circuit provided by the invention；
Fig. 6 A is the equivalent electricity of the specific embodiment T1 in the first stage of common electrical voltage regulator circuit provided by the invention Lu Tu；
Fig. 6 B is equivalent electricity of the specific embodiment in second stage T2 of common electrical voltage regulator circuit provided by the invention Lu Tu；
Fig. 7 is the clock cable and common voltage of a preferred embodiment of common electrical voltage regulator circuit provided by the invention Position view between cabling；
Fig. 8 is each clock cable output using the preferred embodiment of common electrical voltage regulator circuit as shown in Figure 7 Clock signal and common voltage feedback line VCOM-Feedback output voltage waveform diagram.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.
A kind of common electrical voltage regulator circuit as shown in Figure 1, comprising: negative feedback operational amplifier OP-VCOM, first resistor R1, second resistance R2,3rd resistor R3 and first capacitor C1；
The normal phase input end VCOM-IN_P of negative feedback operational amplifier OP-VCOM is public by 3rd resistor R3 and benchmark Voltage output end VCOM-OUT connection；Benchmark common voltage output end VCOM-OUT outputting reference common voltage Vj；
The inverting input terminal VCOM-IN_N of negative feedback operational amplifier OP-VCOM passes sequentially through first resistor R1 and first Capacitor C1 is connect with common voltage feedback line VCOM-Feedback；
The output end of negative feedback operational amplifier OP-VCOM is connect with common voltage compensating line VCOM-Compensation；
Second resistance is connected to the inverting input terminal VCOM-IN_N and negative-feedback fortune of negative feedback operational amplifier OP-VCOM Between the output end for calculating amplifier OP-VCOM；
In Fig. 1, for VCOM-Feedback feedback common voltage feedback signal after first capacitor C1 fluctuation voltage For Vf, the output voltage Vo of OP-VCOM；
Wherein, Vo=Vj- (R2/R1) × Vf；
From the above equation, we can see that embodiment is provided when (public pressure wire includes common voltage feedback line VCOM- to public pressure wire Feedback and common voltage compensating line VCOM-Compensation) around clock cable output clock signal be in When rising edge and/or failing edge, since the clock signal is very high as the control input voltage amplitude of GOA unit, cause public The Ripple (fluctuation) of voltage is very big namely Vf, and value is very big, and Vf is exported later after being amplified by OP-VCOM to common voltage Compensating line generates horizontal band to can affect greatly to the common voltage on display panel.
As shown in Fig. 2, common electrical voltage regulator circuit provided in an embodiment of the present invention, including benchmark common voltage output end VCOM-OUT and common voltage negative-feedback amplifying unit 11；The first input end ID1 of common voltage negative-feedback amplifying unit 11 with Benchmark common voltage output end VCOM-OUT connection, the output end and common voltage of common voltage negative-feedback amplifying unit 11 compensate Line VCOM-Compensation connection；
Common electrical voltage regulator circuit provided in an embodiment of the present invention further include:
Filter unit FU, respectively with benchmark common voltage output end VCOM-OUT and common voltage negative-feedback amplifying unit First input end ID1 connection, the ripple of the benchmark common voltage for filtering out benchmark common voltage output end VCOM-OUT output； And
Control unit 12, it is negative anti-with filter unit FU, common voltage feedback line VCOM-Feedback and common voltage respectively The the second input terminal ID2 connection for presenting amplifying unit 11 disconnects common voltage feedback line VCOM- for controlling in compensated stage Connection between Feedback and the second input terminal ID2 of common voltage negative-feedback amplifying unit 11, and control benchmark common electrical Pressure output end VCOM-OUT is connect by filter unit FU with the second input terminal ID2 of common voltage negative-feedback amplifying unit 11, The of conducting common voltage feedback line VCOM-Feedback and common voltage negative-feedback amplifying unit 11 is controlled in non-compensated stage Connection between two input terminal ID2, and control disconnection benchmark common voltage output end VCOM-OUT and put with common voltage negative-feedback Connection between second input terminal ID2 of big unit 11；
The initial time of compensated stage is the distance between common voltage feedback line VCOM-Feedback in preset distance At the time of the clock signal of clock cable output in range is in rising edge and/or failing edge, and compensated stage remains pre- If duration；
Non- compensated stage is the period removed except compensated stage.
Specifically, filter unit FU may include filter capacitor.
In practical operation, filter unit FU can only include a filter capacitor, and filter unit FU also may include it His any component that can play filter action, is not construed as limiting the specific structure of filter unit FU at this.
In practical operation, the first input end of common voltage negative-feedback amplifying unit can be put for common voltage negative-feedback Second input terminal of the normal phase input end for the negative feedback operational amplifier that big unit includes, common voltage negative-feedback amplifying unit can Think the inverting input terminal for the negative feedback operational amplifier that common voltage negative-feedback amplifying unit includes.
Clock signal at a distance between common voltage feedback line VCOM-Feedback in predetermined distance range When the clock signal of line output is in rising edge and/or failing edge, common electrical voltage regulator circuit provided in an embodiment of the present invention is logical Crossing the control of control unit 12 is not common voltage negative-feedback amplifying unit by public electrode voltages feedback line VCOM-Feedback 11 provide input signal, and controlling by benchmark public electrode voltages output end VCOM-OUT is common voltage negative-feedback amplifying unit 11 provide input signal, improve common voltage wave phenomenon with control, eliminate coupling of the clock cable to common voltage cabling Effect, to improve horizontal band.
In the embodiment of the present invention, public voltage signal line includes common voltage feedback line VCOM-Feedback and common electrical Compensating line VCOM-Compensation is pressed, clock cable mends common voltage feedback line VCOM-Feedback and common voltage It repays line VCOM-Compensation while generating coupling, the public affairs for causing common voltage feedback line VCOM-Feedback to export Feedback voltage and the common compensation voltage of common voltage compensating line VCOM-Compensation output can all have fluctuation altogether, but It is since common electrical voltage regulator circuit provided in an embodiment of the present invention passes through 11 pairs of common voltage negative-feedback amplifying unit inputs Fluctuation alternating component in common voltage feedback line VCOM-Feedback amplifies, by amplified output voltage by public Voltage compensation line VCOM-Compensation inputs to public electrode, therefore common voltage compensating line VCOM-Compensation The coupling for the clock cable being subject to itself and the fluctuation common voltage negative-feedback amplifying unit generated are by negative anti- Present amplifying circuit, therefore the coupling of clock cable that common voltage compensating line VCOM-Compensation itself is subject to And the fluctuation generated can be ignored.
Specifically, common voltage can be public electrode voltages, or other are any to be coupled by clock cable And generate the voltage of fluctuation.
In practical operation, common voltage feedback line VCOM-Feedback and common voltage compensating line VCOM- Compensation is disposed adjacent on display panel, is display panel by common voltage compensating line VCOM-Compensation Electrode or terminal provide common voltage.
In the specific implementation, what benchmark common voltage output end VCOM-OUT was exported is the model previously according to display panel The DC voltage of setting, the DC voltage of benchmark common voltage output end VCOM-OUT output may as extraneous influence and Generate the lesser fluctuation of numerical value.
Specifically, as shown in figure 3, control unit 12 includes:
Pulse control signal generation module 121, for generating pulse control signal PCtrl, pulse control signal PCtrl's Pulse width corresponds to compensated stage；And
Switch module 122 is connect with pulse control signal generation module 121, for the control in pulse control signal PCtrl Under system, is controlled in compensated stage and disconnect common voltage feedback line VCOM-Feedback and common voltage negative-feedback amplifying unit 11 The second input terminal ID2 between connection, and control benchmark common voltage output end VCOM-OUT and pass through filter unit FU and public Second input terminal of common voltage negative-feedback amplifying unit 11 connects, and controls conducting common voltage feedback line in non-compensated stage Connection between VCOM-Feedback and the second input terminal ID2 of common voltage negative-feedback amplifying unit 11, and control disconnection base Connection between quasi- common voltage output end VCOM-OUT and the second input terminal ID2 of common voltage negative-feedback amplifying unit 11.
In practical operation, pulse control signal generation module 121 may include a pulse signal generator and one Operational amplifier, pulse signal generator generate the pulse control signal of the rising edge and/or failing edge that correspond to clock signal, But since the high value of the pulse control signal is smaller, which is unable to control switch module 122 and includes Switching transistor conducting, it is therefore desirable to the pulse control signal is amplified by the operational amplifier to obtain pulse control Signal processed, the corresponding switching transistor for turning on the switch module 122 and including can be controlled in the corresponding period.
Specifically, pulse control signal generation module also may include pulse signal generator.
Specifically, pulse control signal generation module 121 is specifically used for being in when the clock signal of clock cable output It is second electrical level that the current potential of pulse control signal PCtrl is controlled when rising edge and/or failing edge from the first level jump, and is kept After second electrical level preset duration jump be the first level, keep the first level until clock cable output clock signal again In rising edge and/or failing edge；
Switch module 122 is used for the control when the current potential of pulse control signal PCtrl is second electrical level and disconnects common voltage Connection between feedback line VCOM-Feedback and the second input terminal of common voltage negative-feedback amplifying unit 11, and control base Quasi- common voltage output end VCOM-OUT passes through the second input terminal of filter unit FU and common voltage negative-feedback amplifying unit 11 Connection；
Switch module 122 is also used to when the current potential of pulse control signal PCtrl be that common electrical is connected in the first level time control system The connection between feedback line VCOM-Feedback and the second input terminal of common voltage negative-feedback amplifying unit 11 is pressed, and is controlled Disconnect the company between benchmark common voltage output end VCOM-OUT and the second input terminal of common voltage negative-feedback amplifying unit 11 It connects；That is, clock signal will not be to common voltage feedback line VCOM- when clock signal is not at rising edge and/or failing edge The voltage of Feedback output generates strong coupling, does not need to compensate common voltage by benchmark common voltage at this time Line compensates, and the control of switch module 122 conducting common voltage feedback line VCOM-Feedback and common voltage negative-feedback are amplified Connection between second input terminal of unit 11.
Specifically, second electrical level is low level when the first level is high level；When the first level is low level, the Two level are high level.
Illustrate that pulse control signal generation module 121 is generated below by a specific waveform diagram of pulse control signal to be somebody's turn to do The process of pulse control signal:
When the first switch transistor that switch module 122 includes is n-type transistor, what switch module 122 included second is opened When pass transistor is p-type transistor, the first level is low level, and second electrical level is high level；When the switch module 122 includes First switch transistor be p-type transistor, the second switch transistor that switch module 122 includes be n-type transistor when, first Level is high level, and second electrical level is low level；
When the clock signal of clock cable output is in rising edge and/or failing edge, pulse control signal generates mould It is high level that the current potential that block 121 controls pulse control signal PCtrl is jumped from low level, and is controlled in preset duration tp later The current potential for maintaining PCtrl is high level, later until clock signal is again at rising edge and/or failing edge pulse control signal The jump in potential that generation module 121 controls PCtrl is low level and is maintained low level；Namely preset duration tp is pulse control The potential duration of signal PCtrl is the length of the time of high level.In practical operation, the value of preset duration tp is can basis Actual needs and adjust, as long as the value of tp be less than adjacent two rising edge clock signals and/or failing edge time interval ?.
Specifically, common voltage negative-feedback amplifying unit 11 may include negative feedback operational amplifier, first resistor, second Resistance and 3rd resistor, wherein
Second resistance is connected to the inverting input terminal of negative feedback operational amplifier and the output end of negative feedback operational amplifier Between；
The inverting input terminal of negative feedback operational amplifier and the first end of first resistor connect；
The first end of 3rd resistor is connect with benchmark common voltage output end, the second end and negative-feedback operation of 3rd resistor The normal phase input end of amplifier connects；
The second end of first resistor is connect with switch module；
The output end of reversed feedback amplifier is connect with common voltage compensating line.
Specifically, common electrical voltage regulator circuit provided in an embodiment of the present invention, further includes first capacitor；
Switch module includes:
First switch transistor, the control terminal of first switch transistor and the output end of pulse control signal generation module connect It connects, first end is connect by first capacitor with common voltage feedback line, and second end passes through first resistor and negative-feedback operation amplifier The inverting input terminal of device connects；And
Second switch transistor, the control terminal of second switch transistor and the output end of pulse control signal generation module connect Connect, first end is connected by the normal phase input end of filter unit and negative feedback operational amplifier, second end by first resistor with The inverting input terminal of negative feedback operational amplifier connects.
In practical operation, when transistor is TFT (Thin Film Transistor, thin film transistor (TFT)) or MOS When (Metal-Oxide-Semiconductor, Metal-oxide-semicondutor) pipe, control terminal can be the grid of transistor, First end can be source electrode or the drain electrode of transistor, and second end can be drain electrode or the source electrode of transistor；When transistor is three poles Guan Shi, control terminal can be the base stage of transistor, and first end can be the emitter or collector of transistor, and second end can be The collector or emitter of transistor.
In practical operation, the type of first switch transistor and the type of second switch transistor can be it is opposite, That is, second switch transistor is p-type transistor when first switch transistor is n-type transistor；When first switch transistor When being p-type transistor, second switch transistor is n-type transistor.
Illustrate common electrical voltage regulator circuit of the invention below by a specific embodiment.
As shown in figure 4, a specific embodiment of common electrical voltage regulator circuit of the invention includes filter unit, first capacitor C1, common voltage negative-feedback amplifying unit and control unit；
Filter unit includes the second capacitor C2；
Control unit includes:
Pulse control signal generation module 121, for generating pulse control signal PCtrl；And
Switch module 122 is connect with pulse control signal generation module 121；
Common voltage negative-feedback amplifying unit includes negative feedback operational amplifier OP-VCOM, first resistor R1, second resistance R2 and 3rd resistor R3, wherein
Second resistance R2 is connected to inverting input terminal VCOM-IN_N and the negative-feedback of negative feedback operational amplifier OP-VCOM Between the output end of operational amplifier OP-VCOM；
The inverting input terminal VCOM-IN_N of negative feedback operational amplifier OP-VCOM is connect with the first end of first resistor R1；
The output end of negative feedback operational amplifier OP-VCOM is connect with common voltage compensating line VCOM-Compensation；
The first end of 3rd resistor R3 is connect with benchmark common voltage output end VCOM-OUT, the second end of 3rd resistor R3 It is connect with the normal phase input end VCOM-IN_P of negative feedback operational amplifier OP-VCOM；
The second end of first resistor R1 is connect with switch module 122；
The normal phase input end VCOM-IN_P of negative feedback operational amplifier OP-VCOM passes through the second capacitor C2 and switch module 122 connections；
Switch module 122 includes first switch transistor M1 and second switch transistor M2；
The grid of first switch transistor M1 is connect with the output end of pulse control signal generation module 121, first switch The source electrode of transistor M1 is connect by first capacitor C1 with common voltage feedback line VCOM-Feedback, first switch transistor Drain electrode connect with the inverting input terminal VCOM-IN_N of negative feedback operational amplifier OP-VCOM by first resistor R1；
The grid of second switch transistor M2 is connect with the output end of pulse control signal generation module 121, second switch The source electrode of transistor M2 is connected by the normal phase input end VCOM-IN_P of first capacitor C1 and negative feedback operational amplifier OP-VCOM It connects, the drain electrode of second switch transistor M2 passes through the inverting input terminal of first resistor R1 and negative feedback operational amplifier OP-VCOM VCOM-IN_N connection；
The output end of pulse control signal generation module 121 exports pulse control signal PCtrl；
Pulse control signal generation module 121 includes for generating arteries and veins according to the rising edge and/or failing edge of clock signal It rushes the pulse signal generator (being not shown in Fig. 4) of signal CS1 and generates pulse control letter for amplifying pulse signal CS1 The pulse operational amplifier OP-PCtrl of number PCtrl；
The normal phase input end of pulse operational amplifier OP-PCtrl accesses CS1；
The inverting input terminal of pulse operational amplifier OP-PCtrl accesses d. c. voltage signal Std18；
The voltage value of d. c. voltage signal Std18 is 1.8V.
In specific embodiment as shown in Figure 4, R3 is that positive input resistance, R1 and R2 amplify for common voltage negative-feedback Feedback resistance in unit can change putting for common voltage negative-feedback amplifying unit by the resistance value of adjusting R1 and the resistance value of R2 Big multiple；C1 is filter capacitor, and C1 is used to acquire the alternating component in VCOM-Feedback output voltage signal, and C2 is used for CS1 acquires the alternating component in VCOM-OUT output voltage signal during being high level.
In Fig. 4, M1 is p-type transistor, and M2 is n-type transistor.
As shown in Figure 5A, in this embodiment, illustratively, common voltage feedback line VCOM-Feedback and public affairs Common voltage compensating line VCOM-Compensation is set on the left of six clock cables；To in practical operation, with common electrical The number for the clock cable for pressing feedback line VCOM-Feedback and common voltage compensating line VCOM-Compensation adjacent And it is not construed as limiting；
Six articles of clock cables are followed successively by the first clock cable CLK1, second clock signal wire CLK2, from left to right Three clock cable CLK3, the 4th clock cable CLK4, the 5th clock cable CLK5, the 6th clock cable CLK6；
In fig. 5, marked as GOA UnitN+1It is N+1 grades of GOA units, marked as GOA UnitN+2It is N+2 Grade GOA unit, marked as GOA UnitN+3It is N+3 grades of GOA units, marked as GOA UnitN+4It is that N+4 grades of GOA are mono- Member, marked as GOA UnitN+5It is N+5 grades of GOA units, marked as GOA UnitN+6It is N+6 grades of GOA units；Label For Gate-OUTN+1For N+1 grades of gate drive signals, marked as Gate-OUTN+2For N+2 grades of gate drive signals, label For Gate-OUTN+3For N+3 grades of gate drive signals, marked as Gate-OUTN+4For N+4 grades of gate drive signals, label For Gate-OUTN+5For N+5 grades of gate drive signals, marked as Gate-OUTN+6For N+6 grades of gate drive signals, N is positive Integer.
Fig. 5 B shows the timing of the timing diagram of the first clock signal of CLK1 output, the second clock signal that CLK2 is exported Figure, the timing diagram of the third clock signal of CLK3 output, the timing diagram of the 4th clock signal of CLK4 output, CLK5 output the The timing diagram and common voltage feedback line VCOM- for the 6th clock signal that timing diagram, the CLK6 of five clock signals are exported The waveform of the voltage of Feedback output.
By Fig. 5 B it is found that above-mentioned each clock signal rising edge and/or failing edge, common voltage feedback line VCOM- There is Ripple (fluctuation) by a relatively large margin in the voltage of Feedback output, if not carrying out shielding processing to the fluctuation, but Directly by VCOM-Feedback export voltage input common voltage negative-feedback amplifying unit, then the fluctuation can by VCOM-OP into Output is to common voltage compensating line VCOM-Compensation after the amplification of one step, enter back into later panel (display panel) into And generate horizontal band.
Due to CLK1-CLK6 and common voltage cabling (including common voltage feedback line VCOM-Feedback and common voltage Compensating line VCOM-Compensation) the distance between it is variant, therefore, CLK1-CLK6 makees the coupling of common voltage cabling With not of uniform size, distance is closer, couples bigger, therefore CLK1-CLK3 is affected to common voltage cabling, and CLK4-CLK6 pairs The influence of common voltage cabling is smaller, therefore generates three positive three negative Ripple (fluctuation), which passes through OP-VCOM It is amplified into display panel and then generates the dark horizontal band of bright three row of three rows.
As shown in Figure 5 B, under the rising edge of the first clock signal of CLK1 output and the 4th clock signal of CLK4 output Along being overlapped, the rising edge of the 4th clock signal of the failing edge and CLK4 output of the first clock signal of CLK1 output is overlapped drop, The failing edge of 5th clock signal of the rising edge and CLK5 output of the second clock signal of CLK2 output is overlapped, CLK2 output The rising edge of 5th clock signal of failing edge and the CLK5 output of second clock signal is overlapped, the third clock letter of CLK3 output Number rising edge and CLK6 output the 6th clock signal failing edge be overlapped, CLK3 output third clock signal failing edge It is overlapped with the rising edge of the 6th clock signal of CLK6 output.
Present invention specific embodiment as shown in Figure 4 at work, as (Fig. 5 C is common voltage tune shown in Fig. 4 to Fig. 5 C The working timing figure of the specific embodiment on economize on electricity road),
T1 (T1 is compensated stage) in the first stage, the clock letter of any one clock cable output in CLK1-CLK6 When number being in rising edge, CS1 is high level, as (Fig. 6 A is the equivalent of specific embodiment shown in Fig. 4 T1 in the first stage to Fig. 6 A Circuit diagram) shown in, M2 conducting, M1 is disconnected and (since M1 is disconnected, M1, C1 and VCOM-Feedback is not shown in fig. 6), The voltage signal from VCOM-Feedback is shielded at this time, by the benchmark public voltage signal of VCOM-OUT output through the second electricity Hold the inverting input terminal VCOM-IN_N that negative feedback operational amplifier OP-VCOM is inputted after C2 is filtered；In fig. 6, it is denoted as VCOM-IN_P is the normal phase input end of negative feedback operational amplifier OP-VCOM；
It is divided into two kinds of situations at this time:
(1) the first situation: Vj is d. c. voltage signal, and Vj accesses VCOM-IN_P by R3 at this time, and VCOM-IN_N connects The signal entered is 0V, then Vo=Vj at this time；
(2) second situation, Vj are the d. c. voltage signal by noise jamming, and the value of Vj is Vj0+ Δ Vj；Vj0 is straight Voltage signal is flowed, Vj is Δ Vj by the AC ripple ingredient of noise jamming, then Vj accesses VCOM-IN_P by R3, and Δ Vj is logical R1 access VCOM-IN_N is crossed, then Vo=Vj- (R2/R1) × Δ Vj at this time；
Second stage T2 (T2 is non-compensated stage), CS1 is low level, as shown in Figure 6B, M1 conducting, M2 disconnection (by Disconnected in M2, therefore M2 and C2 be not shown in figure 5B), to the negative-phase input VCOM- of negative feedback operational amplifier OP-VCOM IN_N inputs the fluctuation voltage Vf in the common voltage feedback signal of normal VCOM-Feedback feedback；Vo=Vj- at this time (R2/R1)×Vf。
As shown in Figure 5 C, after using common electrical voltage regulator circuit of the invention, the voltage signal of VCOM-IN_N is accessed There is no fluctuations.
The specific embodiment of common electrical voltage regulator circuit of the invention is by Tcon (pulse signal generator) according to clock The corresponding output pulse signal CS1 of signal, in the fluctuation of rising edge and failing edge the shielding VCOM-Feedback output of clock signal Signal eliminates coupling of the clock signal cabling to common voltage cabling, to improve horizontal band.CS1 is the width of high level Degree (namely value of preset duration tp) can be controlled by adjusting Tcon.
Preferably, there are 2N clock signals in predetermined distance range at a distance between common voltage feedback line Line, and the N+n clock signal that the n-th clock signal and the N+n articles clock cable of nth clock cable output export is same When frequency reverse phase, common voltage feedback line and common voltage compensating line are all set among 2N clock cable；
Nth clock cable and the N+n articles clock cable are respectively arranged at the two sides of common voltage feedback line, and The distance between n articles of clock cable and common voltage feedback line are equal to the N+n articles clock cable and common voltage feedback line The distance between；
N is positive integer, and n is the positive integer less than or equal to N.
Preferably, the high value of nth clock cable is equal to the high value of the N+n articles clock cable, nth The low level value of clock cable is equal to the low level value of the N+n articles clock cable.
That is, common voltage feedback line can be set among a plurality of clock cable, when the n-th clock cable is arranged In the left side of common voltage feedback line, and when N+n clock cable is set to the right side of common voltage feedback line, it is set to public affairs The rising edge of the waveform of the n-th clock cable on the left of common voltage feedback line, which corresponds to, to be set on the right side of common voltage feedback line The failing edge of the waveform of N+n clock cable is set to the waveform of the n-th clock cable on the left of common voltage feedback line Failing edge corresponds to the rising edge of the waveform for the clock cable being set on the right side of common voltage feedback line, and nth clock is believed The distance between number line and common voltage feedback line be equal to the between N+n articles of clock cable and common voltage feedback line away from From, and set equal with the high value of the N+n articles clock cable for the high value of nth clock cable, by n-th The low level value of article clock cable is set as equal with the low level value of the N+n articles clock cable, so that the n-th of left side Clock cable is to the coupling of common voltage feedback line and the N+n clock cable on right side to common voltage feedback line Coupling can be offset, and then improve horizontal band.
In practical operation, common voltage compensating line be can be set on the side of common voltage feedback line, the common voltage Compensating line is also disposed among nth clock cable and the N+n articles clock cable, can also suitably make the clock of two sides Signal wire offsets the coupling of common voltage compensating line.
As shown in fig. 7, the first clock cable CLK1, second clock signal wire CLK2 and third clock cable CLK3 are set Be placed in the left side of common voltage feedback line VCOM-Feedback, the 4th clock cable CLK4, the 5th clock cable CLK5 and 6th clock cable CLK6 is set to the right side of common voltage feedback line VCOM-Feedback；
In Fig. 7, marked as GOA UnitM+1It is M+1 grades of GOA units；
Marked as GOA UnitM+2It is M+2 grades of GOA units, marked as GOA UnitM+3It is that M+3 grades of GOA are mono- Member, marked as GOA UnitM+4It is M+4 grades of GOA units, marked as GOA UnitM+5It is M+5 grades of GOA units, label For GOA UnitM+6It is M+6 grades of GOA units；Marked as Gate-OUTM+1For M+1 grades of gate drive signals, marked as Gate-OUTM+2For M+2 grades of gate drive signals, marked as Gate-OUTM+3For M+3 grades of gate drive signals, marked as Gate-OUTM+4For M+4 grades of gate drive signals, marked as Gate-OUTM+5For M+5 grades of gate drive signals, marked as Gate-OUTM+6For M+6 grades of gate drive signals, M is positive integer.
As shown in fig. 7, VCOM-Compensation is also disposed on the centre of each clock cable, it is set to VCOM- The side of Feedback.
As shown in figure 8, under the rising edge of the first clock signal of CLK1 output and the 4th clock signal of CLK4 output Along being overlapped, the rising edge of the 4th clock signal of the failing edge and CLK4 output of the first clock signal of CLK1 output is overlapped drop, The failing edge of 5th clock signal of the rising edge and CLK5 output of the second clock signal of CLK2 output is overlapped, CLK2 output The rising edge of 5th clock signal of failing edge and the CLK5 output of second clock signal is overlapped, the third clock letter of CLK3 output Number rising edge and CLK6 output the 6th clock signal failing edge be overlapped, CLK3 output third clock signal failing edge It is overlapped with the rising edge of the 6th clock signal of CLK6 output；The fluctuation of the voltage signal of VCOM-Feedback output is cancelled.
In the embodiment shown in fig. 7, need the high value of CLK1 identical with the high value of CLK4, the low electricity of CLK1 Level values are identical with the low level value of CLK4, and the high value of CLK2 and the high value of CLK5 are identical, the low level value of CLK2 and The low level value of CLK5 also wants identical, and the high value of CLK3 and the high value of CLK6 are identical, the low level value of CLK3 and The low level value of CLK6 is identical.
Common voltage adjusting method provided in an embodiment of the present invention, it is public applied to above-mentioned common electrical voltage regulator circuit Voltage adjusting method includes:
The benchmark that the first input end of common voltage negative-feedback amplifying unit receives the output of benchmark common voltage output end is public Common voltage；
Under the control of the control unit, in compensated stage, the second input terminal of common voltage negative-feedback amplifying unit is received The benchmark common voltage of benchmark common voltage output end output passes through the ripple after filter unit；In non-compensated stage, common electrical The second input terminal of negative-feedback amplifying unit is pressed to receive the signal of common voltage feedback line output；
The output end of common voltage negative feedback amplifier circuit is to common voltage compensating line output signal.
Common voltage adjusting method provided in an embodiment of the present invention compensated stage under the control of the control unit, control base The benchmark common voltage of quasi- common voltage output end output is input to common voltage negative-feedback by the ripple after filter unit and puts Second input terminal of big unit, thus the common voltage feedback signal of the shielding big common voltage feedback line output of numerical value at this time Fluctuation voltage, can control improves common voltage wave phenomenon, eliminates coupling of the clock cable to common voltage cabling, To improve horizontal band.
Specifically, when control unit includes pulse control signal generation module and switch module,
Under the control of the control unit, in compensated stage, the second input terminal of common voltage negative-feedback amplifying unit is received The benchmark common voltage of benchmark common voltage output end output is specifically included by the ripple step after filter unit:
In compensated stage, since the clock signal that clock cable exports is in rising edge and/or failing edge, i.e., from arteries and veins The current potential of punching control signal generation module control pulse control signal is since the first level jump is second electrical level, when default In length, the current potential of pulse control signal generation module control pulse control signal remains second electrical level, in pulse control signal Under the control of switch module, it is defeated that the second input terminal of common voltage negative-feedback amplifying unit receives benchmark common voltage output end Benchmark common voltage out passes through the ripple step after filter unit；
In non-compensated stage, the second input terminal of common voltage negative-feedback amplifying unit receives the output of common voltage feedback line Signals step specifically include:
In non-compensated stage, jumped from the current potential of pulse control signal generation module control pulse control signal from second electrical level Become the first level to start, and keep the first level until clock cable output clock signal be again at rising edge and/ Or in the time of failing edge；Under the control of pulse control signal and switch module, the of common voltage negative-feedback amplifying unit Two input terminals receive the signal of common voltage feedback line output.
Specifically, when the first level is high level, second electrical level is low level, alternatively, when the first level is low level When, second electrical level is high level.
Display panel provided in an embodiment of the present invention includes common voltage feedback line, common voltage compensating line and above-mentioned public affairs Common-battery voltage regulator circuit.
Preferably, display panel provided in an embodiment of the present invention further includes 2N clock cable；
The distance between 2N clock cable and common voltage feedback line are in predetermined distance range, and nth clock N-th clock signal of signal wire output and the N+n clock signal with same frequency and reversed-phase of the N+n articles clock cable output, common electrical Pressure feedback line and common voltage compensating line are all set among 2N clock cable；
Nth clock cable and the N+n articles clock cable are respectively arranged at the two sides of common voltage feedback line, and The distance between n articles of clock cable and common voltage feedback line are equal to the N+n articles clock cable and common voltage feedback line The distance between；
N is positive integer, and n is the positive integer less than or equal to N.
Preferably, the high value of nth clock cable is equal to the high value of the N+n articles clock cable, nth The low level value of clock cable is equal to the low level value of the N+n articles clock cable.
Display device provided in an embodiment of the present invention includes above-mentioned display panel.
It is the preferred embodiment of the present invention above, it is noted that for those skilled in the art, Without departing from the principle of the present invention, it can also make several improvements and retouch, these improvements and modifications also should be regarded as this The protection scope of invention.

Claims (13)

1. a kind of common electrical voltage regulator circuit, including benchmark common voltage output end and common voltage negative-feedback amplifying unit；Institute The first input end for stating common voltage negative-feedback amplifying unit is connect with the benchmark common voltage output end, the common voltage The output end of negative-feedback amplifying unit is connect with common voltage compensating line；It is characterized in that, the common electrical voltage regulator circuit is also Include:
Filter unit, it is defeated with the first of the benchmark common voltage output end and the common voltage negative-feedback amplifying unit respectively Enter end connection, the ripple of the benchmark common voltage for filtering out the benchmark common voltage output end output；And
Control unit, respectively with the filter unit, common voltage feedback line and the common voltage negative-feedback amplifying unit The connection of second input terminal is put for disconnecting the common voltage feedback line in compensated stage control with the common voltage negative-feedback Connection between second input terminal of big unit, and control benchmark common voltage output end and pass through the filter unit and the public affairs Second input terminal of common voltage negative-feedback amplifying unit connects, the control of non-compensated stage be connected the common voltage feedback line with Connection between second input terminal of the common voltage negative-feedback amplifying unit, and it is defeated to control the disconnection benchmark common voltage Connection between outlet and the second input terminal of the common voltage negative-feedback amplifying unit；
The initial time of the compensated stage is the distance between described common voltage feedback line in predetermined distance range At the time of the clock signal of clock cable output is in rising edge and/or failing edge, the compensated stage maintains preset duration；
The non-compensated stage is other stages removed except the compensated stage.
2. common electrical voltage regulator circuit as described in claim 1, which is characterized in that the filter unit includes filter capacitor.
3. common electrical voltage regulator circuit as described in claim 1, which is characterized in that the common voltage negative-feedback amplifying unit Including negative feedback operational amplifier, first resistor, second resistance and 3rd resistor, wherein
The second resistance be connected to the negative feedback operational amplifier inverting input terminal and the negative feedback operational amplifier Output end between；
The inverting input terminal of the negative feedback operational amplifier is connect with the first end of the first resistor；
The first end of the 3rd resistor is connect with the benchmark common voltage output end, the second end of the 3rd resistor and institute State the normal phase input end connection of negative feedback operational amplifier；
The second end of the first resistor is connect with described control unit；
The output end of the negative feedback operational amplifier is connect with common voltage compensating line.
4. the common electrical voltage regulator circuit as described in any claim in claims 1 to 3, which is characterized in that the control Unit includes:
Pulse control signal generation module, for generating pulse control signal, the pulse width of the pulse control signal is corresponding In the compensated stage；And
Switch module is connect with the pulse control signal generation module, under the control of the pulse control signal, Compensated stage control disconnect the common voltage feedback line and the common voltage negative-feedback amplifying unit the second input terminal it Between connection, and control benchmark common voltage output end the by filter unit and the common voltage negative-feedback amplifying unit The connection of two input terminals；The common voltage feedback line is connected in the control of non-compensated stage and common voltage negative-feedback amplification is single Connection between second input terminal of member, and control and disconnect the benchmark common voltage output end and the common voltage negative-feedback Connection between second input terminal of amplifying unit.
5. common electrical voltage regulator circuit as claimed in claim 4, which is characterized in that the pulse control signal generation module packet Include pulse signal generator.
6. common electrical voltage regulator circuit as claimed in claim 4, which is characterized in that the pulse control signal generation module is used The current potential of pulse control signal is controlled when the clock signal exported when the clock cable is in rising edge and/or failing edge It is second electrical level from the first level jump, and keeping jump after the second electrical level preset duration is first level, is kept First level is until the clock signal of clock cable output is again at rising edge and/or failing edge；
The switch module is used for the control when the current potential of the pulse control signal is second electrical level and disconnects the common voltage Connection between feedback line and the second input terminal of the common voltage negative-feedback amplifying unit, and it is defeated to control benchmark common voltage Outlet is connect by filter unit with the second input terminal of the common voltage negative-feedback amplifying unit；
The switch module is also used to when the current potential of the pulse control signal be that the common electrical is connected in the first level time control system The connection between feedback line and the second input terminal of the common voltage negative-feedback amplifying unit is pressed, and controls and disconnects the benchmark Connection between common voltage output end and the second input terminal of the common voltage negative-feedback amplifying unit.
7. common electrical voltage regulator circuit as claimed in claim 6, which is characterized in that when first level is high level, The second electrical level is low level；When first level is low level, the second electrical level is high level.
8. common electrical voltage regulator circuit as claimed in claim 4, which is characterized in that further include first capacitor；The common electrical Pressing negative-feedback amplifying unit includes negative feedback operational amplifier and first resistor；
The switch module includes:
First switch transistor, the control terminal of the first switch transistor and the output end of pulse control signal generation module connect It connects, first end is connect by the first capacitor with the common voltage feedback line, and second end passes through the first resistor and institute State the inverting input terminal connection of negative feedback operational amplifier；And
Second switch transistor, the control terminal of the second switch transistor and the output end of pulse control signal generation module connect It connects, first end is connect by the filter unit with the normal phase input end of the negative feedback operational amplifier, and second end passes through institute First resistor is stated to connect with the inverting input terminal of the negative feedback operational amplifier.
9. the common electrical voltage regulator circuit as described in any claim in claims 1 to 3, which is characterized in that when with institute The distance between common voltage feedback line is stated in predetermined distance range there are 2N clock cable, and nth clock signal It is described public when the N+n clock signal with same frequency and reversed-phase that the n-th clock signal of line output and the N+n articles clock cable export Voltage Feedback line and the common voltage compensating line are all set among the 2N clock cable；
The nth clock cable and the N+n articles clock cable are respectively arranged at the common voltage feedback line Two sides, and the distance between the nth clock cable and the common voltage feedback line are believed equal to the N+n bars clock The distance between number line and the common voltage feedback line；
N is positive integer, and n is the positive integer less than or equal to N.
10. a kind of common voltage adjusting method, applied to the common voltage as described in any claim in claim 1 to 9 Adjust circuit, which is characterized in that the common voltage adjusting method includes:
The first input end of common voltage negative-feedback amplifying unit receives the benchmark common electrical of benchmark common voltage output end output Pressure；
Under the control of the control unit, in compensated stage, the second input terminal of the common voltage negative-feedback amplifying unit is received The benchmark common voltage of benchmark common voltage output end output passes through the ripple after filter unit；In non-compensated stage, the public affairs Second input terminal of common voltage negative-feedback amplifying unit receives the signal of common voltage feedback line output；
The output end of the common voltage negative feedback amplifier circuit is to common voltage compensating line output signal.
11. a kind of display panel, which is characterized in that including common voltage feedback line, common voltage compensating line and such as claim 1 To common electrical voltage regulator circuit described in any claim in 9.
12. display panel as claimed in claim 11, which is characterized in that further include 2N clock cable；
The distance between the 2N clock cable and the common voltage feedback line are in predetermined distance range, and nth N-th clock signal of clock cable output and the N+n clock signal with same frequency and reversed-phase of the N+n articles clock cable output, institute It states common voltage feedback line and the common voltage compensating line is all set among the 2N clock cable；
The nth clock cable and the N+n articles clock cable are respectively arranged at the common voltage feedback line Two sides, and the distance between the nth clock cable and the common voltage feedback line are believed equal to the N+n bars clock The distance between number line and the common voltage feedback line；
N is positive integer, and n is the positive integer less than or equal to N.
13. a kind of display device, which is characterized in that including the display panel as described in claim 11 or 12.
CN201610670268.5A 2016-08-15 2016-08-15 Common electrical voltage regulator circuit, method, display panel and device Active CN106023877B (en)

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